Also, after reading this I was almost certain I had seen this posted on Bullshido before. Sure enough, with a little searching, here it is. It goes more or less like this thread, with a little bit more of the lulz.

That may be only a single point of data, but in contrast, I have studied the effectiveness of MMA by watching hundreds of UFC fights. I conclude that MMA is effective exactly 50% of the time.

Not to be too pedantic, but technically it is effective slightly less than 50% of the time since there are occasional draws, in which cases neither MMA practitioner wins, and so therefore neither one's fighting style is effective.